PL EN


Preferences help
enabled [disable] Abstract
Number of results
2005 | 107 | 5 | 729-737
Article title

Positronium Trapping in Porous Solids: Means and Limitations for Structural Studies

Content
Title variants
Languages of publication
EN
Abstracts
EN
Positron annihilation techniques are used for the structural investigation of solids but the interpretation of results in grainy and porous media is still unclear. A unique picture can be obtained assuming that the dominant process is Ps trapping in competing "extended free volume" sites. In samples with a large amount of free volumes near-saturation Ps trapping will rule the lifetime pattern, and very long lifetimes of over 100 ns might arise from o-Ps trapped in mesopores. It is shown that lifetime parameters must be corrected for the 3γ/2γ counting efficiency ratio. The results demonstrate the high sensitivity of Ps to mesopores in zeolites but also that Ps-trapping poses limitations on the applicability of lifetime to structural investigation in porous systems. The evolution of the lifetime spectra upon changes in the sample and measuring conditions should be considered in a complex way, observing not only changes in some selected components but in the whole lifetime pattern simultaneously.
Keywords
EN
Contributors
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • Lab. Chim. Nucléaire, IReS, IN2P3/CNRS, B.P. 28, 67037 Strasbourg Cedex 2, France
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
author
  • Inst. of Isotope and Surface Chemistry, P.O.B. 77, 1525 Budapest, Hungary
author
  • KFKI Res. Inst. for Part. Nucl. Physics, P.O.B. 49, 1525 Budapest 114, Hungary
  • Centr. Res. Inst. for Chemistry, P.O.B. 19, 1525 Budapest, Hungary
author
  • Centr. Res. Inst. for Chemistry, P.O.B. 19, 1525 Budapest, Hungary
author
  • Lab. Mat. Minéraux, URA CNRS 4283, rue A. Werner, 68093 Mulhouse Cedex, France
author
  • Lab. Mat. Minéraux, URA CNRS 4283, rue A. Werner, 68093 Mulhouse Cedex, France
author
  • Dept. of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
author
  • Dept. of Physics, University of Coimbra, Coimbra 3004-516, Portugal
author
  • Dept. of Physics, University of Coimbra, Coimbra 3004-516, Portugal
author
  • Dept. of Physics, University of Coimbra, Coimbra 3004-516, Portugal
  • Instituto Superior de Engenharia, Coimbra 3004-535, Portugal
References
  • 1. R. Paulin, G. Ambrosino, C.R. Acad. Sci. Paris, 263, 207, 1966
  • 2. For a general reference, see Principles and Applications of Positron and Positronium Chemistry, Eds. Y.C. Jean, P.E. Mallon, D.M. Schrader, World Scientific, Singapore 2003
  • 3. M. Debowska, J.Ch. Abbé, G. Duplâtre, Phys. Status Solidi B, 146, 91, 1988
  • 4. G. Duplâtre, Zs. Kajcsos, I. Billard, L. Liszkay, K. Lázár, L. Lohonyai, H.K. Beyer, P. Caullet, J. Patarin, in: Studies in Surface Science and Catalysis 125, Eds. I. Kiricsi, G. Pál-Borbély, J.B. Nagy, H.G. Karge, Elsevier, Amsterdam 1999, p. 277
  • 5. M. Eldrup, D. Lightbody, J.N. Sherwood, Chem. Phys., 63, 51, 1981
  • 6. Y.C. Jean, Microchem. J., 42, 72, 1990
  • 7. D.W. Gidley, W.E. Frieze, T.L. Dull, A.F. Yee, E.T. Ryan, H.M. Ho, Phys. Rev. B, 60, R5157, 1999
  • 8. B. Jasinska, A.L. Dawidowicz, T. Goworek, S. Radkiewicz, Phys. Chem. Chem. Phys., 2, 3269, 2000
  • 9. L. Liszkay, Zs. Kajcsos, G. Duplâtre, K. Lázár, G. Pál-Borbély, H.K. Beyer, Mater. Sci. Forum, 363-365, 377, 2001
  • 10. Ch. Dauwe, Mater. Sci. Forum, 105-110, 1857, 1992
  • 11. Zs. Kajcsos, L. Liszkay, L. Varga, K. Lázár, G. Brauer, C. Dauwe, Mater. Sci. Forum, 175-178, 959, 1995
  • 12. G. Duplâtre, Z. Kajcsos, T. Goworek, L. Varga, L. Liszkay, I. Billard, K. Lázár, J. Radioanal. Nucl. Chem., 211, 225, 1996
  • 13. Zs. Kajcsos, G. Duplâtre, L. Varga, I. Billard, L. Liszkay, L. Lohonyai, P. Caullet, J. Patarin, K. Lázár, Mater. Sci. Forum, 255-257, 405, 1997
  • 14. L. Liszkay, Z. Kajcsos, G. Duplâtre, K. Lázár, G. Pál-Borbély, H.K. Beyer, Mater. Sci. Forum, 363-365, 377, 2001
  • 15. Zs. Kajcsos, L. Liszkay, G. Duplatre, L. Lohonyai, L. Varga, K. Lázár, G. Pál-Borbély, H.K. Beyer, P. Caullet, J. Patarin, A.P. de Lima, C.L. Gil, P.M. Gordo, M.F.F. Marques, Radiat. Phys. Chem., 68, 363, 2003
  • 16. J.L. Guth, H. Kessler, R. Wey, in: Proc. 7th Int. Zeol. Conf., Tokyo, Eds. Y. Murakami, A. Iijima, J.W. Ward, Kodansha-Elsevier, Tokyo 1986, p. 121
  • 17. S.J. Wang, B. Wang, J. Zhu, Z. Wang, Y.Q. Dai, C.Q. He, Mater. Sci. Forum, 363-365, 219, 2001
  • 18. Zs. Kajcsos, G. Duplâtre, L. Liszkay, to be published in Nucl. Instrum. Methods Phys. Res. B
  • 19. G. Duplatre, Zs. Kajcsos, L. Liszkay, to be published in Phys. Status Solidi A
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n503kz
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.